[instagram] Certificate error with python3

[jaimeMF]

The test for instagram is currently failing in python 3: https://travis-ci.org/rg3/youtube-dl/jobs/12415785#L284, with this error:

ssl.CertificateError: hostname 'distilleryvesper11-19.ak.instagram.com' doesn't match either of '*.akamaihd.net', '*.akamaihd-staging.net', 'a248.e.akamai.net'

We should add a warning and use http in python3, and maybe disable the test.

[phihag]

This looks like SAN is not supported in Python. Maybe we can patch it in?

[jaimeMF]

The funny thing is that the travis test passes now, while I still get the error in my computer.
I have tested with the last version of wget (1.14), aria2c and Firefox and all of them complain about the certificate, which I think they support SAN.
I know little about certificates, but the certifcate only list three possible domains: *.akamaihd.net, *.akamaihd-staging.net and a248.e.akamai.net, how would you patch it to don't fail if the actual host is distilleryvesper11-19.ak.instagram.com